<template>
	<view class="catgory-wrap">
		<view class="u-flex wrapper-box">
			<!-- 左侧分类列表 -->
			<scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view"
				:scroll-top="scrollLeftTop">
				<view v-for="(item, index) in tabbarList" :key="index" class="u-tab-item u-ellipsis-1"
					:class="[currentTab == index ? 'u-tab-item-active' : '']" :data-current="index"
					@tap.stop="swichMenu(index)">
					<text class="menu-name">{{ item.name }}</text>
				</view>
				<view class="hack-tabbar"></view>
			</scroll-view>

			<!-- 右侧商品列表 -->
			<view class="right-wrap ">
				<scroll-view scroll-y class="right-box menu-scroll-view" @scrolltolower="loadMore"
					v-if="tabbarList.length">
					<view class="u-flex u-row-center" v-if="tabbarList[currentTab].image">
						<image class="category-img" :src="tabbarList[currentTab].image" mode="aspectFill"></image>
					</view>
					<view class="category-title">{{ tabbarList[currentTab].name }}</view>

					<view class="sh-big-card-wrap u-m-20 " v-for="(item, index) in goodsList" :key="item.id">
						<view class="big-goods-card" @tap="jump('/pages/goods/detail', { id: item.id })">
							<view class="img-wrap u-m-b-20">
								<image class="goods-img" :src="item.image" mode="aspectFill"></image>
								<image class="goods-tag" v-if="item.is_hot && !item.activity"
									:src="$IMG_URL + '/goods/goods_hot_tag.png'" mode=""></image>
							</view>
							<view class="goods-title u-p-x-20 u-m-b-10 u-ellipsis-2">
								<view v-if="item.activity_type" class=" sm cu-tag radius title-tag u-m-r-10"
									:style="{ backgroundColor: typeMap[item.activity_type].tagBg, color: '#fff' }">
									{{ typeMap[item.activity_type].text }}
								</view>
								{{ item.title }}
							</view>
							<view class="goods-subtitle u-p-x-20 u-m-b-10 u-ellipsis-1">{{ item.subtitle }}</view>
							<!-- 满减，满折 -->
							<view class="u-p-x-20" v-if="item.activity_discounts_tags.length">
								<view class="tag-box u-m-b-10 u-m-r-10"
									v-for="(tag, index1) in item.activity_discounts_tags" :key="index1">{{ tag }}</view>
							</view>
							<view class="goods-progress u-p-x-20 u-flex u-m-b-10">
								<view style="width:230rpx;">
									<u-line-progress height="16" :show-percent="false" :percent="Number(item.percent)"
										active-color="#e6b873"></u-line-progress>
								</view>
								<view class="googs-send-num u-m-l-20">已售{{ item.sales }}件</view>
							</view>
							<view class="u-flex u-row-between u-p-x-20">
								<view class="price-box u-flex font-OPPOSANS">
									<view class="price">{{ item.price }}</view>
									<view class="origin-price u-m-l-10">￥{{ item.original_price }}</view>
								</view>
								<view class="cart-box">
									<!-- 单规格 -->
									<view class="" v-if="!item.activity">
										<view v-if="!item.is_sku">
											<button v-if="!isCart(item.id)"
												:style="item.activity_type ? typeMap[item.activity_type].btnBg : ''"
												@tap.stop="addCart(item.sku_price[0])" class="u-reset-button cart-btn">
												加入购物车
											</button>
											<view class="num-step" @tap.stop v-else>
												<u-number-box :value="checkCart[item.id].num" :long-press="false"
													:min="0" :max="maxStep" :step="1" :index="index"
													@min="onMin(item.id)" @plus="plus($event, item.sku_price[0])"
													@change="onChangeNum($event, item.sku_price[0])"></u-number-box>
											</view>
										</view>
										<!-- 多规格 -->
										<button class="u-reset-button item-btn sel-sku "
											:style="item.activity_type ? typeMap[item.activity_type].btnBg : ''"
											@tap.stop="selSku(item)" v-else>
											选规格
										</button>
									</view>
									<button class="u-reset-button item-btn sel-sku"
										:style="item.activity_type ? typeMap[item.activity_type].btnBg : ''"
										v-else>立即抢购</button>
								</view>
							</view>
						</view>
					</view>

					<!-- 缺省页 -->
					<shopro-empty v-if="isEmpty" marginTop="200rpx" :image="$IMG_URL + '/imgs/empty/empty_goods.png'"
						tipText="暂无该商品，还有更多好货等着你噢~"></shopro-empty>

					<!-- 加载更多 -->
					<u-loadmore v-if="goodsList.length" height="80rpx" :status="loadStatus" icon-type="flower"
						color="#ccc" />
					<view class="hack-tabbar"></view>
				</scroll-view>
			</view>
		</view>

		<!-- 规格弹窗 -->
		<shopro-sku v-if="showSku && goodsInfo.id" v-model="showSku" :goodsInfo="goodsInfo" :buyType="'cart'">
		</shopro-sku>
	</view>
</template>

<script>
	import { mapMutations, mapActions, mapState, mapGetters } from 'vuex';
	export default {
		components: {},
		data() {
			return {
				showSku: false, //是否显示规格弹窗
				isEmpty: false,
				currentTab: 0,
				categoryID: 0, //分类id
				scrollLeftTop: 0, //左边滚动距离
				menuHeight: 0, // 左边菜单的高度
				menuItemHeight: 0, // 左边菜单item的高度
				tabbarList: [], //左侧分类列表
				goodsList: [], //商品列表
				goodsInfo: {}, //点击商品详情
				numberDisabled: false, //购物车计数器
				loadStatus: 'loadmore', //loadmore-加载前的状态，loading-加载中的状态，nomore-没有更多的状态
				currentPage: 1,
				lastPage: 1,
				maxStep: 999,
				typeMap: {
					seckill: {
						text: '秒杀',
						tagBg: '#FF5854',
						goodsBg: '/imgs/tag/seckill_x_bg.png',
						btnText: '去抢购',
						btnBg: 'background: linear-gradient(90deg, #D01325, #ED3C30);'
					},
					groupon: {
						text: '拼团',
						tagBg: '#FE832A',
						goodsBg: '/imgs/tag/groupon_x_bg.png',
						btnText: '马上拼',
						btnBg: 'background: linear-gradient(90deg, #FF6600 0%, #FE832A 100%);'
					}
				}
			};
		},
		props: {
			categoryStyleId: {
				type: Number,
				default: 0
			}
		},
		computed: {
			...mapGetters(['totalCount', 'isSel', 'cartNum', 'cartList', 'isLogin']),
			// 购物车检测
			checkCart() {
				let obj = {};
				this.cartList.forEach(item => {
					obj[item.goods_id] = {
						num: item.goods_num,
						cartOrderId: item.id
					};
				});
				return obj;
			}
		},
		async created() {
			console.log('%c当前分类：快速购买', 'color:green;background:yellow');
			await this.getCategory();
			let res = await this.getGoodsList();
		},

		methods: {
			...mapActions(['getCartList', 'changeCartList', 'addCartGoods']),
			// 跳转详情
			toGoodDetail(id) {
				this.$Router.push({ path: '/pages/goods/detail', query: { id: id } });
			},

			// 百分比
			getProgress(sales, stock) {
				let unit = '';
				if (stock + sales > 0) {
					let num = (sales / (sales + stock)) * 100;
					unit = num.toFixed(2) + '%';
				} else {
					unit = '0%';
				}
				return unit;
			},

			// 加载更多
			loadMore() {
				if (this.currentPage < this.lastPage) {
					this.currentPage += 1;
					this.getGoodsList();
				}
			},

			// 获取分类
			async getCategory() {
				const tabbarData = await this.$http('category.detail', {
					id: this.categoryStyleId
				});
				this.tabbarList = tabbarData.data.children;
				this.categoryID = this.tabbarList[0]?.id;
			},

			// 获取分类商品
			getGoodsList() {
				let that = this;
				that.loadStatus = 'loading';
				that.$http(
						'goods.lists', {
							category_id: that.categoryID,
							page: that.currentPage
						},
						'加载中...'
					)
					.then(res => {
						if (res.code === 1) {
							that.goodsList = [...that.goodsList, ...res.data.data];
							that.goodsList.map(item => {
								item.percent = item.stock + item.sales > 0 ? ((item.sales / (item.sales + item
									.stock)) * 100).toFixed(2) : 0;
							});
							that.isEmpty = !that.goodsList.length;
							that.lastPage = res.data.last_page;
							that.loadStatus = that.currentPage < res.data.last_page ? 'loadmore' : 'nomore';
						}
					})
					.then(() => {
						that.isLogin && that.getCartList();
					});
			},

			// 点击左边的栏目切换
			async swichMenu(index) {
				if (index == this.currentTab) return;
				this.currentTab = index;
				this.categoryID = this.tabbarList[index].id;
				this.currentPage = 1;
				this.lastPage = 1;
				this.goodsList = [];
				await this.getGoodsList();
				// 如果为0，意味着尚未初始化
				if (this.menuHeight == 0 || this.menuItemHeight == 0) {
					await this.getElRect('menu-scroll-view', 'menuHeight');
					await this.getElRect('u-tab-item', 'menuItemHeight');
				}
				// 将菜单菜单活动item垂直居中
				this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
			},

			// 获取一个目标元素的高度
			getElRect(elClass, dataVal) {
				new Promise((resolve, reject) => {
					const query = uni.createSelectorQuery().in(this);
					query
						.select('.' + elClass)
						.fields({ size: true }, res => {
							// 如果节点尚未生成，res值为null，循环调用执行
							if (!res) {
								setTimeout(() => {
									this.getElRect(elClass);
								}, 10);
								return;
							}
							this[dataVal] = res.height;
						})
						.exec();
				});
			},

			// 加入购物车
			addCart(goods) {
				let obj = {
					goods_id: goods.goods_id,
					goods_num: 1,
					sku_price_id: goods.id,
					goods_price: goods.price
				};
				let confirmGoodsList = {
					list: [obj],
					from: 'goods'
				};
				this.addCartGoods(confirmGoodsList).then(res => {
					if (res.code === 1) {
						this.$u.toast(res.msg);
					}
				});
			},
			// 检测商品在购物车中的下标
			checkGoodsIndex(id) {
				let cIndex = 0;
				this.cartList.forEach((item, index) => {
					if (id == item.goods_id) {
						cIndex = index;
					}
				});
				return cIndex;
			},

			// 到达最小值
			onMin(goodsId) {
				const that = this;
				let cartGoodId = 0;
				cartGoodId = this.cartList.filter(item => item.goods_id === goodsId)[0].id;
				uni.showModal({
					title: '删除提示',
					confirmColor: '#f0c785',
					content: `是否确认从购物车中删除此商品?`,
					success: res => {
						res.confirm && this.changeCartList({ ids: [cartGoodId], art: 'delete' });
					}
				});
			},

			// 增加
			plus(e, sku) {
				if (e.value >= sku.stock) {
					this.maxStep = sku.stock > 999 ? 999 : sku.stock;
					this.$u.toast('库存不足');
					return;
				}
				if (this.detail.activity_type === 'seckill' || this.detail.activity_type === 'groupon') {
					let rules = this.detail.activity.rules;
					if (rules.limit_buy != 0 && e.value >= rules.limit_buy) {
						this.maxStep = rules.limit_buy;
						this.$u.toast('本次活动最多购买' + rules.limit_buy + '件');
						return;
					}
				}
			},

			// 更改商品数
			// 更改商品数
			async onChangeNum(e, sku) {
				let gIndex = this.checkGoodsIndex(sku.goods_id);
				if (e.value != this.checkCart[sku.goods_id].num) {
					uni.showLoading({
						mask: true
					});
					this.$set(this.cartList[gIndex], 'goods_num', +e.value);
					await this.changeCartList({
						ids: [this.checkCart[sku.goods_id].cartOrderId],
						goodsNum: +e.value,
						art: 'change'
					});
					await uni.hideLoading();
				}
			},
			// 检测是否为购物车商品
			isCart(id) {
				let goodsId = id + '';
				return Object.keys(this.checkCart).includes(goodsId);
			},

			// 添加购物车
			async selSku(info) {
				this.goodsInfo = {};
				this.getGoodsDetail(info.id);
				this.showSku = true;
			},
			// 商品详情
			getGoodsDetail(id) {
				let that = this;
				that.$http('goods.detail', {
					id: id
				}).then(res => {
					if (res.code === 1) {
						that.goodsInfo = res.data;
					}
				});
			},

			// 路由跳转
			jump(path, parmas) {
				this.$Router.push({
					path: path,
					query: parmas
				});
			}
		}
	};
</script>

<style lang="scss" scoped>
	.hack-tabbar {
		height: calc(100rpx + env(safe-area-inset-bottom) / 2);
		width: 100%;
	}

	// 最外层结构包裹
	.catgory-wrap {
		height: calc(100vh);
		/* #ifdef H5 */
		height: calc(100vh - var(--window-top));
		/* #endif */
		display: flex;
		flex-direction: column;
	}

	.wrapper-box {
		flex: 1;
		display: flex;
		overflow: hidden;
	
	// 左侧menu
		.u-tab-view {
			width: 200rpx;
			height: 100%;

			.u-tab-item {
				height: 84rpx;
				background: #f6f6f6;
				width: 200rpx;
				padding-left: 16rpx;
				font-size: 26rpx;
				color: #444;
				font-weight: 400;
				line-height: 84rpx;
			}

			.u-tab-item-active {
				position: relative;
				color: #000;
				font-size: 30rpx;
				font-weight: bold;
				background: #fff;
			}

			.u-tab-item-active::before {
				content: '';
				position: absolute;
				border-left: 4px solid #e6b873;
				height: 32rpx;
				left: 0;
				top: 26rpx;
			}
		}
	}

	// 右侧商品滚动
	.right-wrap {
		background-color: #fff;
		height: 100%;
		width: 100%;

		.category-img {
			width: 505rpx;
			height: 150rpx;
			background: #ccc;
			margin: 20rpx auto;
			border-radius: 10rpx;
		}

		.category-title {
			font-size: 30rpx;
			font-weight: bold;
			color: #000;
			margin: 20rpx;
		}

		.right-box {
			height: 100%;
		}
	}

	.big-goods-card {
		background-color: #fff;
		border-radius: 20rpx;
		width: 100%;
		box-shadow: 0 0 8rpx 2rpx rgba(199, 199, 199, 0.3);
		padding-bottom: 20rpx;

		.img-wrap {
			position: relative;
			overflow: hidden;
			height: 256rpx;
			width: 100%;

			.goods-img {
				width: 100%;
				height: 256rpx;
				border-radius: 20rpx 20rpx 0 0;
				background: #f5f5f5;
			}

			.goods-tag {
				position: absolute;
				top: 16rpx;
				left: 16rpx;
				width: 88rpx;
				height: 88rpx;
			}
		}

		.goods-title {
			font-size: 30rpx;
			font-weight: bold;
			color: #333333;
			line-height: 36rpx;
			padding-top: 6rpx;

			.title-tag {
				transform: scale(0.9);
				position: relative;
				top: -6rpx;
			}
		}

		.goods-subtitle {
			font-size: 24rpx;
			font-weight: 400;
			color: #999999;
			line-height: 36rpx;
			width: 480rpx;
		}

		.tag-box {
			border: 1rpx solid #ff0000;
			display: inline-block;
			font-size: 20rpx;
			line-height: 30rpx;
			padding: 0 10rpx;
			color: #ff0000;
			border-radius: 8rpx;
		}

		.goods-progress {
			.cu-progress {
				width: 200rpx;
				height: 20rpx;
				background: rgba(#ff6361, 0.2);
				overflow: visible;
				position: relative;

				.progress--ing {
					background: #ff6361;
					border-radius: 20rpx;
				}

				.round-tag {
					position: absolute;
					bottom: 0;
					width: 20rpx;
					height: 28rpx;
					margin-left: -10rpx;

					.round-tag-img {
						width: 20rpx;
						height: 28rpx;
					}
				}
			}

			.googs-send-num {
				font-size: 24rpx;
				font-weight: 400;
				color: #bebebe;
			}
		}

		.price-box {
			vertical-align: text-bottom;

			.price {
				font-size: 36rpx;
				color: #ff0000;
				font-weight: 600;

				&::before {
					content: '￥';
					font-size: 28rpx;
				}

				vertical-align: text-bottom;
			}

			.origin-price {
				vertical-align: text-bottom;
				font-size: 26rpx;
				font-weight: 400;
				text-decoration: line-through;
				color: #c4c4c4;
			}
		}

		.cart-box {

			.cart-btn,
			.sel-sku {
				width: 172rpx;
				line-height: 58rpx;
				background: linear-gradient(90deg, rgba(233, 180, 97, 1), rgba(238, 204, 137, 1));
				box-shadow: 0px 7rpx 6rpx 0px rgba(229, 138, 0, 0.22);
				border-radius: 30rpx;
				padding: 0;
				font-size: 26rpx;
				font-weight: 500;
				color: #ffffff;
			}
		}
	}
</style>
